J45.90

Non-Billable
ChapterJ00–J99
Ranksubcategory
Official Description

Unspecified asthma

Metadata & Insights
  • •2026 ICD-10-CM Edition - Effective October 1, 2025.
  • •Non-billable category (requires more specific sub-code).
  • •Chapter 10: Diseases of the Respiratory System (J00-J99).

Instructional Notes

Includes
  • Asthmatic bronchitis NOS
  • Childhood asthma NOS
  • Late onset asthma
General instructions are available for the parent sections:
View CH10 NotesView J40-J4A NotesView J45 Notes

Clinical Hierarchy

CH10Diseases of the respiratory system (J00-J99)
J40-J4AChronic lower respiratory diseases (J40-J4A)
J45Asthma
J45.9Other and unspecified asthma
J45.90Unspecified asthma
J45.901Unspecified asthma with (acute) exacerbation
J45.902Unspecified asthma with status asthmaticus
J45.909Unspecified asthma, uncomplicated

Applicable Ancestor Context

The following parent sections contain instructions or notes that apply to J45.90:

blockJ40-J4A
Chronic lower respiratory diseases (J40-J4A)
View context instructions
chapterCH10
Diseases of the respiratory system (J00-J99)
View context instructions

Alphabetic Index Mentions

These are Diagnosis Index lookup paths that route to J45.90. Use them as entry terms for search, then confirm final coding instructions in the Tabular List and notes above.

25 raw paths
Asthma, asthmatic (bronchial) (catarrh) (spasmodic)19 unique routes
Direct index entry→J45.90
allergic extrinsic→J45.90(3 variants)
with(2 variants)
exacerbation (acute)→J45.90
status asthmaticus→J45.90
childhood→J45.90(3 variants)
with(2 variants)
exacerbation (acute)→J45.90
status asthmaticus→J45.90
late-onset→J45.90(3 variants)
with(2 variants)
exacerbation (acute)→J45.90
status asthmaticus→J45.90
mixed→J45.90(3 variants)
with(2 variants)
exacerbation (acute)→J45.90
status asthmaticus→J45.90
nonallergic (intrinsic)→J45.90(3 variants)
with(2 variants)
exacerbation (acute)→J45.90
status asthmaticus→J45.90
predominantly allergic→J45.90
with(2 variants)
exacerbation (acute)→J45.90
status asthmaticus→J45.90
Bronchitis (diffuse) (fibrinous) (hypostatic) (infective) (membranous)3 unique routes
allergic (acute)→J45.90(3 variants)
with(2 variants)
exacerbation (acute)→J45.90
status asthmaticus→J45.90
Dyspnea (nocturnal) (paroxysmal)3 unique routes
asthmatic (bronchial)→J45.90(3 variants)
with(2 variants)
bronchitis→J45.90(2 variants)
with
exacerbation (acute)→J45.90

MS-DRG Classification

2026

No direct MS-DRG triggers identified.

Cross Reference

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